<template>
  <div class="importDiv">
    <input ref="excel-upload-input" class="excel-upload-input" type="file" accept=".xlsx, .xls" @change="handleClick">
    <div class="drop" @drop="handleDrop" @dragover="handleDragover" @dragenter="handleDragover">
      将excel文件拖放到此处或
      <el-button :loading="loading" style="margin-left:16px;"  type="primary" @click="handleUpload">
        选择文件
      </el-button>
    </div>
  </div>
</template>

<script>
// import XLSX from 'xlsx'
import { weiboDataUpload } from '@/api/weibo'
import axios from 'axios'
import { config } from '@vue/test-utils'
export default {
  props: {
    beforeUpload: Function, // eslint-disable-line
    onSuccess: Function// eslint-disable-line
  },
  data() {
    return {
      loading: false,
      excelData: {
        header: null,
        results: null
      }
    }
  },
  methods: {
    generateData({ header, results }) {
      this.excelData.header = header
      this.excelData.results = results
      this.onSuccess && this.onSuccess(this.excelData)
    },
    handleDrop(e) {
      e.stopPropagation()
      e.preventDefault()
      if (this.loading) return
      const files = e.dataTransfer.files
      if (files.length !== 1) {
        this.$message.error('Only support uploading one file!')
        return
      }
      const rawFile = files[0] // only use files[0]

      if (!this.isExcel(rawFile)) {
        this.$message.error('只支持上传 .xlsx, .xls, .csv suffix 的文件')
        return false
      }
      this.upload(rawFile)
      e.stopPropagation()
      e.preventDefault()
    },
    handleDragover(e) {
      e.stopPropagation()
      e.preventDefault()
      e.dataTransfer.dropEffect = 'copy'
    },
    handleUpload() {
      this.$refs['excel-upload-input'].click()
    },
    handleClick(e) {
      const files = e.target.files
      const rawFile = files[0] // only use files[0]
      if (!rawFile) return
      this.upload(rawFile)
    },
    upload(rawFile) {
      this.$refs['excel-upload-input'].value = null // fix can't select the same excel

      if (!this.beforeUpload) {
        this.readerData(rawFile)
        return
      }
      const before = this.beforeUpload(rawFile)
      if (before) {
        this.readerData(rawFile)
      }

      let formData = new FormData();
      formData.append("file", rawFile);
      let config = {
                    headers: {
                      "Content-Type": "multipart/form-data",
                    }
      };
    //   微博数据上传url
      let url = "http://sfddata.tech:8281/weibo/upload"
      axios.post(url, formData,config).then(
          res =>{
          this.$message({
          message: '上传成功',
          type: 'success'
          });
        }
      ).catch(
          ()=>{
          this.$message.error('上传失败');
          }
      )
    },
    readerData(rawFile) {
      this.loading = true
      // return new Promise((resolve, reject) => {
      //   const reader = new FileReader()
      //   reader.onload = e => {
      //     const data = e.target.result
      //     const workbook = XLSX.read(data, { type: 'array' })
      //     const firstSheetName = workbook.SheetNames[0]
      //     const worksheet = workbook.Sheets[firstSheetName]
      //     const header = this.getHeaderRow(worksheet)
      //     const results = XLSX.utils.sheet_to_json(worksheet)
      //     this.generateData({ header, results })
      //     this.loading = false
      //     resolve()
      //   }
      //   reader.readAsArrayBuffer(rawFile)
      // })
    },
    getHeaderRow(sheet) {
      const headers = []
      // const range = XLSX.utils.decode_range(sheet['!ref'])
      // let C
      // const R = range.s.r
      // /* start in the first row */
      // for (C = range.s.c; C <= range.e.c; ++C) { /* walk every column in the range */
      //   const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })]
      //   /* find the cell in the first row */
      //   let hdr = 'UNKNOWN ' + C // <-- replace with your desired default
      //   if (cell && cell.t) hdr = XLSX.utils.format_cell(cell)
      //   headers.push(hdr)
      // }
      return headers
    },
    isExcel(file) {
      return /\.(xlsx|xls|csv)$/.test(file.name)
    }
  }
}
</script>

<style scoped>
.excel-upload-input{
  display: none;
  z-index: -9999;
}
.drop{
  border: 2px dashed #bbb;
  width: 600px;
  height: 160px;
  line-height: 160px;
  margin: 0 auto;
  font-size: 24px;
  border-radius: 5px;
  text-align: center;
  color: #bbb;
  position: relative;
}

.importDiv{
    margin-top: 100px;
}
</style>
